.bt-site-icon {
  display: inline-block;
  width: 1em;
  height: 1em;
  flex: 0 0 auto;
  fill: currentColor;
  vertical-align: -0.125em;
}

.bt-search-icon {
  display: block;
  margin: auto;
}

.bt-article-icon {
  display: block;
}